include/ust/ust_trace.h

   1 /*
   2  * Copyright (C) 2009     Steven Rostedt <srostedt@redhat.com>
   3  * Copyright (C) 2010     Nils Carlson <nils.carlson@ericsson.com>
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  18  *
  19  */
  20
  21 /*
  22  * This whole file is currently a dummy, mapping a TRACE_EVENT
  23  * to a printf
  24  */
  25
  26 /*
  27  * Stage 1. Create a struct and a printf calling function
  28  * that is connected to the tracepoint at load time.
  29  */
  30 #undef TRACE_EVENT
  31 #define TRACE_EVENT(name, proto, args, tstruct, assign, print)          \
  32         DECLARE_TRACE_EVENT_CLASS(name,                                 \
  33                                   PARAMS(proto),                        \
  34                                   PARAMS(args),                         \
  35                                   PARAMS(tstruct),                      \
  36                                   PARAMS(assign),                       \
  37                                   PARAMS(print));                       \
  38         DEFINE_TRACE_EVENT(name, name, PARAMS(proto), PARAMS(args));
  39
  40 #undef __field
  41 #define __field(type, item)             type    item;
  42
  43 #undef TP_STRUCT__entry
  44 #define TP_STRUCT__entry(args...) args
  45
  46 #undef TP_printf
  47 #define TP_printf(fmt, args...) fmt "\n", args
  48
  49 #undef TP_fast_assign
  50 #define TP_fast_assign(args...) args
  51
  52 #undef DEFINE_TRACE_EVENT
  53 #define DEFINE_TRACE_EVENT(template, name, proto, args)
  54
  55
  56 #undef DECLARE_TRACE_EVENT_CLASS
  57 #define DECLARE_TRACE_EVENT_CLASS(name, proto, args, tstruct, assign, print)    \
  58         struct trace_raw_##name {                                       \
  59                 tstruct                                                 \
  60         };                                                              \
  61         static void trace_printf_##name(void *dummy, proto)             \
  62         {                                                               \
  63                 struct trace_raw_##name entry_struct, *__entry;         \
  64                 __entry = &entry_struct;                                \
  65                 { assign };                                     \
  66                                                                         \
  67                 printf(print);                                          \
  68         }                                                               \
  69         static void __attribute__((constructor)) init_##name()          \
  70         {                                                               \
  71                 void *dummy;                                            \
  72                 printf("connecting tracepoint " #name "\n");            \
  73                 register_trace_##name(trace_printf_##name, dummy);      \
  74         }
  75
  76
  77 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)